Stabilized aldol-alphanaphthylamine



Patented Feb. 20, 1945 2,370,011

STATES PATENT OFFHCE STABHJZED ABDUL-ALPHA- NAPHTHYLAIWINE Earle H. Comstock, Nor-walk, Conn, asslgnor to R. T. Vanderbilt Company, Inc., New York, N. E, a corporation of New York No Drawing. Application October 16, 1943, Serial No. 506,557

2 Claims. (Cl. 260-21) Aldol-alpha-naphthylamine is a resinous solid This composition of my invention, a pulveruat ordinary temperatures. At a temperature of lent mixture of aldol-alpha-naphthylamine and 70-80 C. the pulverized material flows together zinc stearate containing a major proportion of to form a solid mass within a very short period; aldol-alpha-naphthylamine and about 5%-10% of at ordinary temperature the material gradually 5 zinc stearate, has a number of important advanfiows together to form asolid'mass. tages, particularly in GR-S rubber compounds In an application filed September 2'7, 1943, such as those described in application Serial No.

Serial No. 504,055, Albert A. Somerville has de- 504,055 previously mentioned. It is easy to hanscribed the use of substantial proportions, about die. It has little tendency to dust or scatter dur- %-20% by weight on the rubber, of aldol- 10 ing incorporation on a compounding mill. It is alpha-naphthylamine in GR-S (Government easily incorporated and dispersed in GR-S rub- Rubber-Styrene) rubber compounds (butadieneber compounds. It retains these properties at styrene copoiymer-type rubber) to impart to the temperatures as high as 70-80 C. Its use in compound the property of reversion. The han- GR-S rubber compounds adds nothing incompatdling and dispersion of the material in such proible to the compound and adds only a very small portions is diflicult because of its resinous propproportion of the zinc stearate. ertles. Zinc stearate exhibits the same properties in I have now discovered that pulverulent aldolcompositions in which the resinous component alpha-naphthyla'inine remains pulverulent even is a combination of aldol-alpha-naphthylamine over long periods at 70-80 C. if a minor proand rosin, for example a combination of three portion of zinc stearate is thoroughly mixed with parts by weight of aldol-alpha-naphthylamine it. Specifically, I hav found that a pulverulent and one part of rosin. My invention includes mixture of aldol-alpha-naphthylamine and zinc compositions comprising a. major proportion of stearate containing a major proportion of aldolaldol-alpha-naphthylamine, rosin and about alpha-naphthylamine and about 5%-l0% by 5%10% of zinc stearate. weight on the mixture of zinc stearate remains I claim: pulverulent indefinitely at 25 C. and for periods 1. A pulverulent mixture of aldol-alpha-naphupwards of 48 hours at C. thylamine and zinc stearate containing a major This composition is conveniently produced by p portion of aldol-alpha-naphthylamine and grinding the aldol-alpha-naphthylamine, mixing 3 about 5%-10% of zinc stearate.

the zinc stearate with the ground material and 2. A pulverulent mixture of. aldol-alpha-naphregrlnding the mixture. The mixture may, for thylamine, rosin and zinc stearate containing 8. example, be ground to pass a 40 mesh screen. major proportion of aldol-alpha-naphthylamine A minimum proportion of about 5% of zinc steaand about 5%-10% of zinc stearate.

rate appears desirable; zinc stearate in excess of 35 about 10% does not appear to be particularly useml. The pulverulent composition is a soft, dry powder.

EARLE H. COMSTOCK. 

